Computing scale



Patented Apr. 25, |899.

W. R. DUNN.

COMPUTING SCALE.

(Application filed Nov. 24, 1897.)

3 Sheets-Sheet l.

(No Model.)

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No. 623,533. Patented Apr. 25, |899. w. n. DUNN.

CUMPUTING SCALE.

(Appncaeion mea Nov. 1.4, 1897.;

3 Sheets-Sheet Q l Il- TTOHNEYS.'

No. 623,533. Patented Apr. 25, |393e l w. n. DUNN. -COMPUTING SCALE.

(Application filed Nov. B4, 1897.) (No Model.) 3 Shasta-Sheet 3.

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mi cams Fc'rcns no, PNomvLrTHo.. wAsHmoroN. nv c .UNITED STATES PATENT OFFICE.

WILLIAM R. DUNN, OF ALTON, INDIANA, ASSIGNOR TO IIIMSELF AND v JAMES M. JENKINS, OFSAMF. PLACE.

COMPUTING-SCALE.

SPECIFICATION forming part of Letters Patent No. 623,533, dated April 25, 1899.

Application iiled November 24, 1897. Serial No. 659,655. (No model.)

Torr/ZZ wwm/ t may concern: f

Ile it known that I, IVILLIAM R. DUNN, of Alton, in the county of Crawford and State of Indiana, have invented a new and Improved Gomputingcalmvof which the following is a full, clear, and exact description.

This invention is a computing-scale having a platform actuating a plurality of beams, and the scale having two weights working, respectively, on beams and referring, respectively, to weight and price, so that upon the proper adjustment of those weights according to the priceand the desired amount of the article the balancing of the scale will indicate that the proper amount of the commodity is on the scale.

This specification is the disclosure of two forms of my invention, while the claims deli ne the actual scope of the invention.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the iigures.

Figure l is a side elevation of the invention with parts broken away and in section. Fig. 2 is a detail perspective view of one of the weights which I employ. Fig. 3 is a plan view of the platform-beams Fig. 4. is a fragmentary elevation showing the manner of slingin g the scale beams to the platformbeams. Fig. 5 is a sectional view on the line 5 lof Fig. l. Fig. 6 is a partial section of a modilied form of the invention adapted to a balance; and Fig. 7 is a side elevation of a modified construction of the invention, parts being broken away and in section.

Referring to the form of my invention shown in Figs. l to 5, the. device has a base '7, on which a platform 8 is supported by means of four'legs t), two of which are shown in the drawings. The legs 9 respectively bear on knife-edges l0, which are four in number and are produced two on each platform-beam Il. The two platform-beams 1l each have two additional knife-edges l2,that respectively bear on pedestals 13, standing within the base '7.

As shown in Fig. 7, the knife-edges l2 bear in swinging loops I4, suspended from above said knife-edges. Inward of the knife-edges l2 the beams il are provided with knife-edges by which means the beams 11 are connected with each other, the beams being arranged one above the other, as shown in Fig. l. Each beam ll has its innerend provided with an arm 1G, Fig. 3, which arms project oppositely to each other and longitudinally past the adjacent knife-edges l0 and l2 and have their extremities bent transversely to form projections 17. Each project-ion 17 carries two links 18, Fig. 4, which hang down therefrom and form slings for the feet l() of the rods 20, such rods extending upward from the projections 17 and respectively through the columns 2l of the scale. A screw 22 is passed through each projection 17 and engages the respective I4, connected with each other by a linkhl,

feet 19, so as to prevent excessive play of the parts. By this arrangement the rods 2O are slung on the beams 1l, so as to be sensitive to the movements thereof, such movements of the beams ll being in turn effected bythe platform 8, Fig. l.

A scale-beam 23 is mounted atits left-hand end on the left-hand column 2l through the medium of knife-edges 24:, bearing in oriiices in the column. The right-hand end of the beam 23 has knife-edges 25, respectively bearing in recesses formed in two plates 26, that are fastened side by side to the righthand rod 20. The drawings show but one of these plates 2G. The poise of the scale-beam 23 may be adjusted by means of a weight 27, working on an angular screw-threaded arm 28, supported from the scale-beam 23. Two weights 29 and 30 slide on the scale-beam 28. The weight 29 is adapted to be seated in a recess 3l, formed in the upper edge of the scale-beam 23, when the scoop of the scale is on the platform, whereupon the weight 29 .will counterbalance the scoop and maintain the equilibrium of the scale. The weight SO slides along graduations on the scale-beam 23 and may be used for tare purposes or for balancing the scale aftera plate or dish has been placed on the platform.

A beam 32, having its right-hand portion graduated to indicate prices per pound and having itsleftdiand portion provided with a counterweight 33, is provided with two plates 34,riveted to the beam and having knife-edges IOO bearing upward in orifices 3G, formed in the left-hand column 3l. Fixed to the upper ends of the rods O and extending horizontally between the two is a scale-beam S7, which may be provided with graduations and having a fulcrum 3S slidable thereon. The fulcrum SS is provided with an upwardlyprojecting plate Si), which is adapted to engage the under side of the price-beam 32 and move the beam upward, so that it will swing on the knife-edges 355, the scope of sueh swinging movement being regulated by the arln 32E and by the position ot' the fulcrum 3S on the scale-beam 237, and consequently by the point on the pricebeam which is engaged by the plate 35). The left-hand end of the price-beam 32 is provided with two knifeedges `t0,that respectively engage eyes vformed in the lower ends of links stl. The links rstl are two in number and are arranged one on cach side of the scale. The drawings show only one link. These links l-l are attached to the main beam of the scale, and the left hand of the price-beam 32 drawing downward actuates said main beam of the scale.

The main beam of the scale is formed of two horizontal parts l2-and 3. These parts are joined to each other by end portions 4t and are each graduated and numbered, so that they will indicate pounds, dollars, and cents. The part Il of the main beam has two knife-edges 15, bearing on pedestals t6,

supported by the top rail t7 of the frame of the scale, such rail in turn being supported by the columns 2l. The upper end of each link tl has an eye, and these eyes respectively receive knife-edges 4S, carried one at each side ot' the part 4.5 of the main scalebeam. On the part t3 of the main scalebeam a weight stt) is mounted to slide, and a pea 50 is mounted to slide on the portion -ti of the main scale-beam. The poise of this beam is adjusted by means of a weight 5l, working on the screw-threaded portion of an arm 52, that is fixed to the beam. The free end of the main scale-beam is guided by means of an arm 53, standing on the rail 17, and the free end of the main scale-beam is also provided with a weight-support -t, pendent therefrom. rlhe weight-support -t is designed to receive weights such as are shown in Fig. These weights may be pr vided with numerals,`as shown in Fig. 2, such numerals indicating the pounds when weighing` for pounds, reading the large figures only, and the numerals indicating cents when weighing for value, reading both large and small tigures for cents. Thus bd cents (S5.00) are indicated in Fig. 2. The same system of numbers is used on the main scale-beam.

The invention maybe used both Afor weighing pounds and ounces and also 'for weighing goods according to the price thereof. To weigh goods, weighing pounds and ounces simply, the fnlcrum 3S should be moved on the scale-beam 37 so that the plate 39 will bear against the price-beam 32 at the grad uation lo thereof, such graduation being positioned with theknife-edgcs 235 direetlyequidistant between the graduation lll and the knifeedges ttl. Movement transmitted Afrom the platform S to the scale-beam 37 will bein turn transniitted to the price-beam 233 and will be transmitted from said beam without variation to the main scale-beam, and such beam will be balanced according to the adjustment of the peas -1-9 and 50 thereof, which adjustment should have been previously made to accord with the desired weightof merchandise. To weigh the goods according to the price thereof, the graduations on the main scale-beam are considered as dollars and cents. New should a customer desire fifty cents worth of goods atten cents a pound the pea 50 should be moved to the graduation of the part t? or -lof the main scale-beam, and the fulcrum 55S should be moved on the scale-beam 237 until the plate Si) is engaged with the price-beam 32, at the graduation lo thereof. According to the balancing of the main scale-beam it maybe known that the requisite amount of merchandise is on the platform S. ln the use ot' the scale the peas 2t) and 30 should be nmnil'mlated for the purposes before described.

The form of my invention shown in Fig. t3 is simply an adaptation of the invention to a balance. This is effected by substituting for one pan of the balance a beam whereon slides a 'fulcrum 3S similar to the fulcrum 3S and having a plate E30 similar to the plate 3ft. The plate 39 engages a beam 32 similar to the beam E32, which beam in turn transmits movement to the main scale-beam through the medium of links il, similar to the links tl. The oocration of the invention in this form is exactly the same as in the form first described.

It will be observed that the scale herein shown and described has no surplus beams or eounterweights to balance the platform or the levers under the platform, as each counterbalances the other.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination with a frame, of aplatform mounted and movable thereon,platformbeams in connection with the platform, rods in connection with the platform-beams and extending vertically, a scale-beam extending horizontally between the rods and rigidly connected thereto, a fulcrum movable along the scale-beam, a second scale-beam pivoted on the frame and having pivotal connection with one of said rods, weights movable on the second scale-beam, a price-beam mounted on the frame and engaged by the fulcrum on the first-named scale-beam, a main scale-beam mounted on the frame, and a connection bctween the price-beam and the main scalebeam.

2. The combination. of a frame, a platform mounted on the Vfra-me, platform-beams bc IIO neath the platform and supporting the same, vertieally-extending rods connected with the platform-beams, a horizontal scale-beam rigidly attached to the rods and extending between the same, a second scale-beam pivotally mounted on the frame and pivotallyeonneeted with one of the rods, a Weight movable on each of the scale-beams, a price-beam mounted on the frame and engaged by one of the Weights, a main scale-beam mounted on the frame, the main scale-beam having two parallel portions, a Weight movable on eaeh of said portions, and a link eonneeting the price- `ueam witlrthe main scale-beam.

In a scale, the combination with a frame,

` of'a platform, two platform-beams mounted beneath the platform and supporting the platform, an extension Carried by eaeh platformbeam, the extensions running oppositely to eaeh other and having laterally-bent end portions, links carried on said end portions, and scale-beam mechanism hungin said links and actuated by the scale-beams.

et. The combination with a frame, of a platform, and platform-beams, a scale-beam having Connection with the platform-beams and moved vertically thereby, a f uleru m movable along the said seale-beam, a price-beam having ulmfardlydisposed knife-edges bearing against the frame, the price-beam being engaged by the fulernm of the said scale-beam, a main scale-beam mounted on the frame, and a link eonneeting` the price-beam with the main scale-beam.

5. The ACombination with a frame and platform mechanism, of a horizontally-disposed beam moved vertically by said platform meehanism, a fulorum movable along the beam, a price-beam loeated above the fulerum and eapable of being engaged thereby, the priee beam having upwardly-disposed knife-edges bearing against the frame, a main scale-beam 'mounted on the frame, and a eonneetion be 

